Alloys 825

Brand name

Incoloy® 825, Nicrofer 4221

Trade name

Alloy 825

Standards

Material No.
2.4858
EN Designation
NiCr21Mo
UNS
N08825
Alloy
825

Description

Alloy 825 / 2.4858 is a titanium-stabilized nickel-iron-chromium alloy with copper and molybdenum.

Special properties

Good resistance to stress-corrosion cracking. Good resistance to oxidizing and non-oxidizing hot acids.

Chemical Composition

C
%
≤ 0.025
Si
≤ %
0.50
Mn
≤ %
1.00
P
≤ %
0.02
S
≤ %
0.015
Cr
%
19.5-23.5
Mo
%
2.50-3.50
Ni
%
38.0-46.0
Ti
≤ %
0.60-1.20
Cu
%
1.50-3.00
Al
%
≤ 0.20
Co
%
≤ 1.00
Fe
%
Rest

Mechanical Properties 20°C

0.2% Yield strength Rp
≥ N/mm²
240
Tensile strength Rm
N/mm²
≥ 550
Elongation A5
≥ %
30
Modulus of elasticity
kN/mm²
195

Physical Properties 20°C

Density
g/cm³
8.1
Specific heat capacity
J/kg K
440
Thermal conductivity
W/m K
10.8
Electrical resistivity
Ω mm²/m
1.12

Suitable welding
filler materials

2.4621

Application

Phosphor and sulphur acids plants, oil and gas production

Available forms for 2.4858 / ALLOY 825

Sheets/Plates
Lieferform
Bars
Lieferform
Wire
Lieferform
Tubes/Pipes
Lieferform
Fittings
Lieferform
Forged / cast parts
Lieferform
Finished part (drawing)
Lieferform

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